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OKLAHOMA CITY, OKLAHOMA – SEPTEMBER 28: Aday Mara #15 of the Oklahoma City Thunder at Paycom Center on September 28, 2026 in Oklahoma City, Oklahoma. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Joshua Gateley\/Getty Images)<\/p>\n
Just days before his highly anticipated NBA<\/a> debut, Oklahoma City Thunder<\/a> rookie Aday Mara<\/a> is facing an unexpected challenge from his past.<\/p>\n The 7-foot-3 center has emerged as one of Oklahoma City\u2019s biggest preseason success stories. But his former professional team in Spain, Basket Zaragoza, is threatening to block his international transfer, raising questions about whether the Thunder\u2019s No. 12 overall pick will be cleared to make his regular-season debut.<\/p>\n On Friday, October 16, Zaragoza issued an official statement<\/a> asserting that Mara remains under contract with the club for the 2026-27 season, despite leaving Spain for college basketball three years ago.<\/p>\n The timing is particularly uncomfortable for Oklahoma City. The Thunder are preparing to open their season against the San Antonio Spurs<\/a> on October 20, and Mara has given the organization plenty of reasons to be excited about his future.<\/p>\n The Thunder issued a statement on the matter shortly after the story went live.<\/p>\n Thunder spokesperson on the status of rookie big man Aday Mara: \u201cAday last played three years of NCAA college basketball and therefore, as advised by the NBA, no clearance from the Spanish team is required for him to play in the NBA.\u201d<\/p>\n Spanish Club Threatens Legal Action Over Thunder Rookie Aday Mara<\/p>\n According to BasketNews, Zaragoza has warned that it will formally oppose any request for Mara\u2019s international transfer, arguing that the 21-year-old remains bound by an agreement with the Spanish organization.<\/p>\n \u201cThe player has a contract in force for the 2026-27 season with Basket Zaragoza,\u201d the club said in its October 16 statement.<\/p>\n Zaragoza explained that it had already communicated its position to the Spanish Basketball Federation, FIBA, the NBA and the Thunder following the 2026 NBA Draft.<\/p>\n The dispute dates to 2023, when Mara left Zaragoza to play college basketball at UCLA.<\/p>\n The Spanish organization maintains that Mara\u2019s departure for the NCAA did not terminate his professional contract. Because international transfer authorization was not required for his move to college basketball, Zaragoza argues that its contractual rights remain intact.<\/p>\n The club also indicated that it is prepared to pursue legal action to protect those rights.<\/p>\n However, there is an important distinction between Zaragoza threatening to oppose the transfer and Mara actually being ruled ineligible.<\/p>\n Spanish newspaper Heraldo de Arag\u00f3n reported on October 16 that other sources believe the disputed transfer document may not be necessary for Mara to play in the NBA.<\/p>\n There has been no confirmed NBA ruling barring Mara from making his debut.<\/p>\n The Thunder, as conveyed by the enclosed statement, are adamant that Aday Mara has the requisite clearance to play in the NBA and says it has been advised as such by the league office.<\/p>\n Mara\u2019s former club in Spain (Basket Zaragoza) maintains he is still under contract. https:\/\/t.co\/nDW6T3RjSh<\/a>\n<\/p>\n \u2014 Marc Stein (@TheSteinLine) October 16, 2026<\/a><\/p>\n Aday Mara Has Been One of the Thunder\u2019s Biggest Preseason Surprises<\/p>\n The controversy comes at an especially frustrating time for Mara, whose performances have made him one of the most intriguing rookies entering the 2026-27 season.<\/p>\n Through his first five preseason appearances, Mara averaged 13.4 points, 7.6 rebounds, 2.8 assists and 2.4 blocks, according to BasketNews.<\/p>\n He also converted 26 of his first 33 field-goal attempts, an impressive display of efficiency for a rookie adjusting to NBA competition.<\/p>\n His breakout included a 22-point performance against the Milwaukee Bucks<\/a> on October 7, when he made all 10 of his field-goal attempts.<\/p>\n He followed that with 17 points, 10 rebounds, six assists and five blocks against the Atlanta Hawks<\/a> on October 12.<\/p>\n Those performances have given Thunder fans a glimpse of what the towering Spanish center might eventually bring to an Oklahoma City frontcourt that already features Chet Holmgren<\/a> and Isaiah Hartenstein<\/a>.<\/p>\n Mara\u2019s combination of size, rim protection and passing ability makes him more than a traditional developmental big man.<\/p>\n Now, instead of entering the season with his attention exclusively on basketball, he faces renewed uncertainty over a contract dispute that began before his college career.<\/p>\n Will Aday Mara Play in the Thunder\u2019s Season Opener?<\/p>\n For now, Mara\u2019s availability for Oklahoma City\u2019s October 20 matchup with San Antonio has not been officially ruled out because of the dispute.<\/p>\n Zaragoza acknowledged that it had not received a formal international transfer request as of its October 16 statement. Its threatened opposition would come if such a request were submitted.<\/p>\n That leaves a significant unresolved question: whether the NBA requires the authorization Zaragoza is threatening to withhold.<\/p>\n For Mara, the situation threatens to overshadow what should be one of the biggest moments of his young career.<\/p>\n He went from Zaragoza\u2019s development system to UCLA, transferred to Michigan, helped the Wolverines win a national championship and became a lottery pick.<\/p>\n After three years of working toward the NBA, his debut is finally within reach.<\/p>\n His former team, however, is making clear that it does not consider their business finished.<\/p>\n \n\t\t\tErik C. Anderson<\/a> is an award-winning sports journalist covering the NBA, NFL, MLB and trading card market for Heavy.com. His coverage focuses on breaking news, trade rumors, roster moves, player contracts and the stories driving national fan conversation. His work has appeared in The New York Times, The Associated Press, USA Today and ESPN. More about Erik C. 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